Senior Backend Engineer, Payments
About Polymarket
Polymarket is the world's largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centralized "house," Polymarket aggregates diverse opinions into transparent, market-based probabilities that reflect collective expectations about the future.
We're growing fast - both in terms of volume ($21B traded in 2025) and adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media and we need your help adding fuel to the fire.
About the Role
Polymarket is looking for a Senior Backend Engineer to build and scale the payments infrastructure that powers deposits, withdrawals, and money movement across the platform.
This role sits at the intersection of engineering and regulated financial operations, and requires the judgment to move fast without compromising correctness or auditability. You'll be a high-ownership individual contributor working closely with Product, Compliance, and Design.
What You'll Do
Design and lead migrations from legacy or monolithic systems to reliable, distributed payments services (Go, gRPC, DynamoDB/MySQL) with no disruption to production money movement
Build and maintain integrations with payment processors, banking rails, and card networks to support deposits, withdrawals, and settlement
Partner cross-functionally with Product, Compliance, and Design to deliver high-stakes financial features such as KYC/EDD, fraud checks, and reconciliation
Own production on-call for money-movement systems where correctness, reliability, and auditability are non-negotiable
Mentor engineers, onboard new hires, and lead backlog grooming and tech-debt reduction efforts
Work closely with engineers across the platform to keep payments systems tightly integrated with the broader exchange
What We're Looking For
Senior-level backend engineering experience with payments, fintech, or financial-data integrations (processors like Stripe, banking rails, card networks)
Proven track record leading migrations from legacy/monolith systems to reliable distributed services (Go, gRPC, DynamoDB/MySQL) without production disruption
Experience partnering with Product, Compliance, and Design to ship regulated or high-stakes financial features (KYC/EDD, fraud, reconciliation)
Comfortable owning production on-call for money-movement systems where correctness and auditability are critical
Track record of mentoring, onboarding, and driving team process (backlog grooming, tech-debt reduction)
(Plus) Experience in crypto, prediction markets, or other high-growth regulated fintech environments
(Plus) Experience deploying systems in cloud environments (AWS/GCP) and using containers
Benefits
Competitive salary & equity
Unlimited PTO
Full Health, Vision, & Dental coverage
401k match
Hardware setup: new MacBook Pro, big display, & accessories
Pay Transparency
Base salary range: $250,000 to $500,000 annually, plus equity and benefits.
This range reflects a good-faith estimate for this position. Experience levels vary widely within a title here, so please reach out even if your expectations fall outside it. We're always happy to chat.
About Polymarket
Polymarket is at the forefront of the decentralized information and prediction market revolution, leveraging cutting-edge blockchain technology to create a more transparent and efficient way to bet on real-world events. We're building a platform where users can trade on their beliefs about everything from politics to pop culture, fostering a global community driven by data and conviction. Our mission is to democratize access to information and enable price discovery in a trustless environment, fundamentally reshaping how people engage with and understand the world. Our team thrives on innovation, intellectual curiosity, and a deep-seated belief in the power of Web3 principles. We champion a culture of open collaboration, radical transparency, and continuous learning, encouraging every team member to contribute their unique perspective to solve complex challenges. We are a group of passionate builders, designers, and strategists united by a vision for a decentralized future, where markets are fair, accessible, and censorship-resistant. At Polymarket, your work directly impacts the evolution of decentralized finance and information. If you're eager to make a significant impact in the nascent but rapidly expanding blockchain space, Polymarket offers an unparalleled opportunity. Join us to contribute to a platform that empowers users, challenges traditional financial systems, and puts the power of prediction back into the hands of the people. We're looking for individuals who are not just skilled but are also true believers in the potential of crypto to create a more informed and equitable world. Come build the future with Polymarket.
Ready to Apply?
To submit your application for this position, please visit Polymarket's official website and follow their application process.